BIO220H1 Lecture Notes - Lecture 22: Antagonistic Pleiotropy Hypothesis, Seabird, Mortality Rate
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BIO220H1 Full Course Notes
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Document Summary
In the meantime, folks (including evolutionary biologists) are working on what to do about drug resistant bugs, and how to extend the useful lifespan of current drugs but you should listen to your doctor. Hydra vs mayfly: mayfly lives as adult for 1 day (mating and laying eggs and then dies, hydra ~1400 years huge amount of variation between animals. Aging: aging - proximate and ultimate causes, costs of reproduction, the evolutionary theories of aging. What is aging or senescence: progressive decline in somatic function reflected in reductions in fertility as well as survivorship, proximate cause progressive degeneration of the soma. Manifestations of aging: general degeneration of the soma. Impaired function (speed, strength, sight, muscle mass, etc) Increased disease (chronic, cancer, organ failure: mortality rate increases with age increased age-specific mortality rate. Senescence: an evolutionary mystery: observation we have evolved to age and die.
